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https://issues.apache.org/jira/browse/HDFS-14624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16877252#comment-16877252
 ] 

Hadoop QA commented on HDFS-14624:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
39s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:red}-1{color} | {color:red} test4tests {color} | {color:red}  0m  
0s{color} | {color:red} The patch doesn't appear to include any new or modified 
tests. Please justify why no new tests are needed for this patch. Also please 
list what manual steps were performed to verify this patch. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 26m 
 6s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
57s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
40s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
8s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m 26s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m  
4s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
49s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
 5s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
56s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
56s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
35s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m  4s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 
12s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
47s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}126m  4s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
54s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}190m 42s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.server.datanode.TestDirectoryScanner |
|   | hadoop.hdfs.TestMultipleNNPortQOP |
|   | hadoop.hdfs.web.TestWebHdfsTimeouts |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:bdbca0e |
| JIRA Issue | HDFS-14624 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12973450/HDFS-14624.001.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 21615cef0835 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2 
17:16:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / e966edd |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_212 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27130/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27130/testReport/ |
| Max. process+thread count | 3781 (vs. ulimit of 10000) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27130/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> When decommissioning a node, log remaining blocks to replicate periodically
> ---------------------------------------------------------------------------
>
>                 Key: HDFS-14624
>                 URL: https://issues.apache.org/jira/browse/HDFS-14624
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 3.3.0
>            Reporter: Stephen O'Donnell
>            Assignee: Stephen O'Donnell
>            Priority: Major
>         Attachments: HDFS-14624.001.patch
>
>
> When a node is marked for decommission, there is a monitor thread which runs 
> every 30 seconds by default, and checks if the node still has pending blocks 
> to be replicated before the node can complete replication.
> There are two existing debug level messages logged in the monitor thread, 
> DatanodeAdminManager$Monitor.check(), which log the correct information 
> already, first as the pending blocks are replicated:
> {code:java}
> LOG.debug("Node {} still has {} blocks to replicate "
>     + "before it is a candidate to finish {}.",
>     dn, blocks.size(), dn.getAdminState());{code}
> And then after the initial set of blocks has completed and a rescan happens:
> {code:java}
> LOG.debug("Node {} {} healthy."
>     + " It needs to replicate {} more blocks."
>     + " {} is still in progress.", dn,
>     isHealthy ? "is": "isn't", blocks.size(), dn.getAdminState());{code}
> I would like to propose moving these messages to INFO level so it is easier 
> to monitor decommission progress over time from the Namenode log.
> Based on the default settings, this would result in at most 1 log message per 
> node being decommissioned every 30 seconds. The reason this is at the most, 
> is because the monitor thread stops after checking after 500K blocks and 
> therefore in practice it could be as little as 1 log message per 30 seconds, 
> even if many DNs are being decommissioned at the same time.
> Note that the namenode webUI does display the above information, but having 
> this in the NN logs would allow progress to be tracked more easily.



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